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' (No Model) 2 Sh-eetsSheet 1.

J. D. MISSROON. SLATE PIUKER No. 560,858. Patented May 26, 1896;;

2 Sheets-Sheet 2.

J. n. MISSROON.

. SLATE PIGKER.

l No. 560,858. Patented May 26, 1896.

Zficeas e6.

. elongated openings a in the ends.

suitable metal rolled or pressed into shape,

NirEn ST TES MASSACHUSETTS, ASSIGNOR TO THE OF SAME PLACE.

JOHN I). MISSROO N, OF CLINTON,

CLINTON IRE CLOTH COMPANY,

SLATE-PICKER.

LettersPatent No. 560,858, dated May 26, 1896.

1894.. Serialllo.5152,4101. cu Infidel.)

SPECIFICATION formingpart of Application filed December 20,

of the corrugations having elongated openings a formed therein ofuniform size, each of such corrugations having, as herein shown, two ofthe openings a separated by a bridgepiece ta which strengthens the weband also assists in the operation of the picker. The web portion of eachsegment is curved similarly to the ends a, several of such segmentsforming the covering of the cylinder.

segments are eachin one integral piece and shaped as described they actas braces or trusses for the load carried in the interior of the picker,the edges of ments abutting, as shown in Fig. 1. WVhile the segments inthemselves possess considerable rigidity they are sub ected to very hardusage, and placed, as they are, upon the outside of the spiders A, thebutt-joints extending from one to the other spider are totallyunprotected and are the first parts of the picker to succumb to wear.

In order to increase the general rigidity of the picker and also toprotect the joints between adjacent segments, I have secured to theinner face of each segment and at one edge a stay-strip d, of steel,corrugated to conform to the shape of the intermediate web a the saidstrip extending to the flat ends a and projecting beyond the edge of theweb, Fig. 2. to the web of the segment by rivets d other permanentfastenings, and the adjacent edge of the web of the next segment whenabutted will be covered and protected by the projecting portion of thestay-strip d, as shown in Fig. 1. The stay-strip being on the inside ofthe joint thus prevents direct contact of the load thereupon and greatlyincreases the rigidity, streng h, and life of the picker. Furthermore,the stay-strips act as tumblers to lift the coal from the groovesin thesegments and cause itto one end of the picker oughly opening up the loadto pick the slate therefrom which passes out through the elongatedopenings a In the modification shown in Fig. i an additional strip e issecured to the inner face of the stay-strip d at the edge secured to thesegment-web 5 to still further increase the er. While the free edge ofTo aZl whom it may concern:

Beit known that 1, JOHN D. MISSROON, of Clinton, county of IVorcester,State of-Massachusetts, have invented an Improvementin Slate-Pickers, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters and figures on the drawingsrepresenting like parts.

This invention has for its object the production of a strong, durable,and effective segment for cylindrical slate pickers employed inseparating flat slate and the like from coal, whereby the strength andrigidity of such pickers and their efficiency in operation are greatlyincreased. In accordance therewith my invention comprises a slate pickersegment consisting of a metallic plate having flat ends and atransversely-corrugated intermediate web integral therewith, elongatedopenings being formed in the outer apexes, and acorrespondingly-corrugated rigid metallic stay-strip secured to theinner face of and at one edge of the web between the flat ends of thesegment and projecting beyond said edge, substantially as will bedescribed.

Other features of my invention will be hereinafter described, andpointed out in the claims.

Figure 1 is an end view, partly broken out, of a cylinder with segmentsembodying my invention applied thereto. Fig. 2 is a side view of thescreen-rings with only one of the segments inplace. Fig. 3 is aperspective view, on a larger scale, of a little more than half of oneof the stay-strips detached; and Fig. 4. is an enlarged sectional detailof a modificationto be described. Fig. 5 is acentral vertical section'ofFig. 2 on an enlarged scale.

The segments A are secured to suitable cylindrical rings or rims A onspiders A forming the supporting-frame of the picker. The segments A, ofwrought-iron, steel, or other pass along from consist of ends a ofproper curvature to fit the spiders A, to which they are secured bysuitable bolts 1), extended through preferably As shown clearly in Fig.2, the ends a are connected by an intermediate transversely-corrugatedweb 0. integral with said ends, the outer apexes action of thestay-strip as a tumbl it is not necessary to attach As the the adjacentsegto the other, more thori segment, and projectingwith an imperforateextension beyond said edge to form a jointprotector, substantially asdescribed.

cylindrical slate-picker, composed of similar segments corrugatedtransversel in termediate their ends and provided with a plurality oftransverse openings, combined with internal stay-strips made of metalcorrugated to fit snugly against the inner side of said segments, onesta -strip being bolted to each segment at one edge thereof and arrangedto progect loosely across the joint and beneath the edge of the the freeend of said one segment to "the stay-strip secured to the adjacent edgeof th edge and through a hole (Z made for 1. A slate-picker segmentconsisting of a versely-corrugated intermediate Web integral therewith,elongated openings being formed a correspondinglycorrugated metallicstay-strip secured to the edge of the Web beis prevented from springingopen at its oints and a plurality of ridges is provided to intercept therevolving mass and tumble it in its progress, substantially asdescribed.

In testimony Whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN D. MISSROON.

beyond said edge, said projecting edge being as described.

made her to form inner face of and at the Web between the ends-of theW'itnesses J OHN O. AUGUSTA a tumbler, secured to the EDWARDs, one edgeof E. DEAN.

